EP 3789508 A4 20210310 - YIELD STRENGTH 460 MPA GRADE HOT-ROLLED HIGH-TOUGHNESS LOW-TEMPERATURE-RESISTANT H-BEAM AND PREPARATION METHOD THEREFOR
Title (en)
YIELD STRENGTH 460 MPA GRADE HOT-ROLLED HIGH-TOUGHNESS LOW-TEMPERATURE-RESISTANT H-BEAM AND PREPARATION METHOD THEREFOR
Title (de)
HOCHZÄHER WARMGEWALZTER NIEDRIGTEMPERATURBESTÄNDIGER H-TRÄGER MIT STRECKGRENZE 460 IN MPA-QUALITÄT UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
POUTRELLE EN H RÉSISTANTE AUX BASSES TEMPÉRATURES DE HAUTE TÉNACITÉ LAMINÉE À CHAUD DE QUALITÉ LIMITE D'ÉLASTICITÉ DE 460 MPA ET SON PROCÉDÉ DE PRÉPARATION
Publication
Application
Priority
- CN 201810467000 A 20180516
- CN 2018121100 W 20181214
Abstract (en)
[origin: EP3789508A1] A yield strength 460 MPa grade hot-rolled high-toughness low-temperatureresistant H-beam, the weight percentage of the chemical components thereof being: C: 0.03%-0.07% Si≤3%, Mn: 1.20%-1.40%, Nb: 0.015%-0.030%, V: 0.10%-0.15%, Ti: 0.015%-0.025%, Ni: 0.25%-0.45%, Cr: 0.30%-0.50%, Als: 0.01%-0.06%, N: 0.010%-0.023%, P≤0.015%, S≤0.010%, and 0<0.004%, and the remainder being Fe and inevitable impurities. By using the N-containing composite micro-alloying composition design, higher strength and toughness can be obtained whilst achieving strength of 460MPa grade and above on an ordinary hot-rolling H-beam steel-rolling machine; the H-beam product has good mechanical properties, yield strength≥460 MPa, tensile strength≥600mpa, and elongation ≥18% and -40°C longitudinal impact energy ≥100J, being suitable for use in extremely low temperature conditions.
IPC 8 full level
C22C 38/00 (2006.01); B21B 1/088 (2006.01); C21D 8/02 (2006.01); C22C 38/04 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01)
CPC (source: CN EP KR)
C21D 8/0205 (2013.01 - CN KR); C21D 8/0226 (2013.01 - CN EP KR); C21D 8/0247 (2013.01 - CN KR); C22C 33/04 (2013.01 - CN KR); C22C 38/001 (2013.01 - CN EP); C22C 38/02 (2013.01 - CN); C22C 38/04 (2013.01 - CN EP); C22C 38/06 (2013.01 - CN); C22C 38/46 (2013.01 - CN EP KR); C22C 38/48 (2013.01 - CN EP KR); C22C 38/50 (2013.01 - CN EP KR); C21D 2211/002 (2013.01 - CN EP KR); C21D 2211/005 (2013.01 - CN EP KR)
Citation (search report)
- [A] CN 103667910 A 20140326 - LAIWU IRON&STEEL GROUP CO LTD
- [A] CN 103243272 A 20130814 - MAGANG GROUP HOLDING CO LTD, et al
- [A] WO 2018043491 A1 20180308 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] US 2015204071 A1 20150723 - MIZOGUCHI MASAKI [JP], et al
- See references of WO 2019218657A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3789508 A1 20210310; EP 3789508 A4 20210310; EP 3789508 B1 20220209; CN 108642381 A 20181012; CN 108642381 B 20200218; JP 2021523304 A 20210902; JP 7098828 B2 20220711; KR 20200143466 A 20201223; WO 2019218657 A1 20191121
DOCDB simple family (application)
EP 18918599 A 20181214; CN 201810467000 A 20180516; CN 2018121100 W 20181214; JP 2021514462 A 20181214; KR 20207032851 A 20181214